It is understood that that six officials have been expelled from the Games, although AIBA officials refused to confirm the number or identities of those involved.

Controversy has centred on Monday night's heavyweight final, in which Russia's Evgeny Tischenko won a verdict over Vasilliy Levit of Kazakhstan, and the defeat for Ireland's Michael Conlan to another Russian, Vladimir Nikitin, on Tuesday.

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One of the judges who scored in favour of Tischenko, Colombia's Armando Carbonell Alvarado, officiated in bouts on Wednesday, as did two of those - Udeni Kiridena of Sri Lanka and Kennedy Do Rosario Silva - who favoured Nikitin.

Despite the controversy, AIBA said there was no possibility of overturning the results of any of the bouts concerned.

AIBA's statement read: "Following recent judging decisions and after carrying out a thorough examination by the relevant commission, AIBA has decided to take immediate and appropriate actions.

"Since the beginning of the Olympic Games, AIBA has conducted 239 bouts. The AIBA R&J commission has reviewed all decisions and determined that less than a handful of the decisions were not at the level expected and consequently it has been decided in accordance with the AIBA R&J evaluation committee that the concerned referees and judges will no longer officiate at the Rio 2016 Olympic Games. In accordance with AIBA rules the result of all the bouts will stand.

Conlan was inconsolable after the fight (Image: GETTY)

"AIBA represents 200 national federations and has continuously sought to evolve the sport of boxing and continuously strive to ensure a level playing field.

"AIBA will not shy away from its responsibilities and is fully committed to a zero tolerance policy towards fair play in boxing, always acting in the boxers' utmost interest.

"The Olympic Games represent the pinnacle of all sports and boxing has been part of this since 1904. It is essential AIBA stands to the values of respect, sportsmanship, excellence and remains committed to a fair and transparent sport.

"With regard to corruption, we would like to strongly restate that unless tangible proof is put forward, not rumours, we will continue to use any means, including legal or disciplinary actions to protect our sport and its R&J community whose integrity is constantly put into question.

"The organisation will not be deterred by subjective judgements made by discontented parties. We welcome all parties to come forward and provide evidence in order to take appropriate and immediate action."

Conlan launched a furious, expletive-laden tirade live on Irish broadcaster RTE immediately after he dropped a points verdict to Russia's Vladimir Nikitin.

Conlan storms out of the ring (Image: GETTY)

The reigning world champion called AIBA officials "f****** cheats" and "cheating b******s" during his post-fight interview, and even tweeted Russian president Vladimir Putin to ask: "Hey Vlad PutinRF-Eng How much did they charge you bro??".

Conlan's decision came one day after a controversial verdict in the men's heavyweight final went the way of Tischenko.

Despite the Kazakh having appeared to dominate the bout, the three judges found in favour of Tischenko, and the decision was met with boos and jeers from the predominantly Brazilian crowd.

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In a particular embarrassment for AIBA, the bout was watched at ringside by International Olympic Committee president Thomas Bach.

Ireland's Michael Gallagher was one of the ringside judges for the heavyweight final bout. He did not officiate on Wednesday, and is believed to have been sent home.

The controversy comes at a particularly difficult time for AIBA, which is pressing ahead with its plans to allow fully professional boxers to participate in the Games.

Embarrassingly, despite pushing through a rule change earlier this year which was designed to tempt star names to compete in Rio, only three established professionals turned up - and all three crashed out early.